炼砖

例句：

1. 1. The builders are busy building new houses in the city.
   建筑工人正在忙着在城市里建造新房子。
2. 2. The construction of the bridge was a major project for the city.
   这座桥的建设是这个城市的一个主要项目。
3. 3. The workers were hard at work, as they had to complete the brick walls before nightfall.
   工人们正努力工作，因为他们必须在日落前完成砖墙的砌筑工作。